一、序言曲线半径不仅影响行车安全、旅客舒适度等行车质量指标,而且影响行车速度、运行时间等技术指标和工程费、运营费等经济指标,是铁路主要工程技术标准之一。 I. Preface The curve radius not only affects driving quality and passenger comfort and other driving quality indexes, but also affects economic indicators such as driving speed and operating time such as technical indicators, construction cost and operating expense, which are one of the major engineering standards for railways.